We turn to our smart phones for everything from news updates to boredom-busting games. But can they help us lose weight? See the best fitness apps that just might get you to shed those pounds fast

Sleep Cycle alarm clock, $0.99 Did you know that your body burns calories while you sleep? For example, a 120-pound person burns about 408 calories with eight hours of shut-eye, which has to be the easiest and most relaxing way to lose weight in our book. That is, until the alarm clock goes off smack in the middle of your "cruising on a yacht with George Clooney" dream. Then you're just tired and cranky.

We feel the most tired when we get woken up during a REM cycle, which is when our brain is in its deepest sleep. By using the accelerometer in your iPhone to monitor your body's movement, this app will wake you up at the most optimal time to give you the most rest (and burn the most calories). Now, you can finish your George Clooney dream in peace.

Can't believe they didn't mention MyFitnessPal! Great for tracking calories, setting goals.. Also, if you have any FitBit products, their site is really good. I can't recommend the FitBit Aria scale and FitBit One tracker enough...such good products!